<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    #liu{color: green;}
    .y{color: yellow;}
    input[type="text"],body>p{background-color: red;}
   body>div>div>p{color: pink;}
   div div p{background-color: yellow;}
    a:link{color: green;}
    a:visited{color: red;}
    a:hover{color: yellow;}
    a:active{color: pink;;}

  </style>
</head>
<body>
<ul>
  <li id="liu">刘备</li>
  <li>关羽</li>
  <li class="y">张飞</li>
</ul>
<input type="text">
<input type="password">
<p>香蕉</p>
<p class="y">苹果</p>
<div>
  <p>p1</p>
  <div><p>p2</p></div>
 <div> <div><p>p3</p></div></div>
</div>
<a href="http://www.qq.com">腾讯</a>
</body>
</html>